从iModel中提取属性

using Autodesk.Revit.DB;
using Autodesk.Revit.UI;

public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
{
    UIApplication uiapp = commandData.Application;
    Document doc = uiapp.ActiveUIDocument.Document;

    FilteredElementCollector collector = new FilteredElementCollector(doc);
    collector.OfCategory(BuiltInCategory.OST_Walls);

    foreach (Element elem in collector)
    {
        Wall wall = elem as Wall;
        if (wall != null)
        {
            ParameterSet parameters = wall.Parameters;
            foreach (Parameter param in parameters)
            {
                string paramName = param.Definition.Name;
                string paramValue = param.AsString();
                TaskDialog.Show("Attribute Extraction", $"Parameter Name: {paramName}, Value: {paramValue}");
            }
        }
    }

    return Result.Succeeded;
}